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YAHOO.ext.tree.AsyncTreeNode = function(config){
this.loaded = false;
this.loading = false;
YAHOO.ext.tree.AsyncTreeNode.superclass.constructor.apply(this, arguments);
this.events['beforeload'] = true;
this.events['load'] = true;
};
YAHOO.extendX(YAHOO.ext.tree.AsyncTreeNode, YAHOO.ext.tree.TreeNode, {
expand : function(deep, anim, callback){
if(this.loading){ // if an async load is already running, waiting til it's done
var timer;
var f = function(){
if(!this.loading){ // done loading
clearInterval(timer);
this.expand(deep, anim, callback);
}
}.createDelegate(this);
timer = setInterval(f, 200);
}
if(!this.loaded){
if(this.fireEvent('beforeload', this) === false){
return;
}
this.loading = true;
this.ui.beforeLoad(this);
var loader = this.loader || this.attributes.loader || this.getOwnerTree().getLoader();
if(loader){
loader.load(this, this.loadComplete.createDelegate(this, [deep, anim, callback]));
return;
}
}
YAHOO.ext.tree.AsyncTreeNode.superclass.expand.call(this, deep, anim, callback);
},
isLoading : function(){
return this.loading;
},
loadComplete : function(deep, anim, callback){
this.loading = false;
this.loaded = true;
this.ui.afterLoad(this);
this.fireEvent('load', this);
this.expand(deep, anim, callback);
},
isLoaded : function(){
return this.loaded;
},
hasChildNodes : function(){
if(!this.isLeaf() && !this.loaded){
return true;
}else{
return YAHOO.ext.tree.AsyncTreeNode.superclass.hasChildNodes.call(this);
}
}
});
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